diff --git a/mailnews/local/tests/mailbox/nsMsgMailboxParserStub.cpp b/mailnews/local/tests/mailbox/nsMsgMailboxParserStub.cpp
index 74d8f5d9251..8ed43746b42 100644
--- a/mailnews/local/tests/mailbox/nsMsgMailboxParserStub.cpp
+++ b/mailnews/local/tests/mailbox/nsMsgMailboxParserStub.cpp
@@ -84,7 +84,7 @@ NS_IMETHODIMP nsMsgMailboxParserStub::OnStatus(nsIURL* aURL, const PRUnichar* aM
     nsString str(aMsg);
     char* c = str.ToNewCString();
     fputs(c, stdout);
-    free(c);
+    delete [] c;
     fputs("\n", stdout);
     
     return 0;